Knife switch



Aug. 251 4 HEBDEN KNIFE SWITCH Filed Feb. 2, 1925 INVENTOR NEY Patented25 1925. I

GEORGE E. HE BDEN, OF PLAINVILLE,

PATENT nnncrmc MANUFACTURING COMPANY, or rnamv:rnnn, CONNECTICUT, acon,-

romrron or CONNECTICUT.

, xmrn swrrcii.

Application and February 2. .1925. swarm. 6,235.

To all whom it may concern:

Be it known that I, GEORGE R. HEBDEN, a citizen of the United States ofAmerica, residing at Plainville, county of Hartford, StateofConnecticut, have invented a new and useful Knife Switch, of which thefollowing is a specification.

Mly invention relates I particularly to switches having one or moreswinging bades. x The main object ,is'to provide a post orjaw which canbe. made cheaply and to which the circuit wire or'conductor may bedirectly connected. j

A further specific object is to form a switch front or jaw from a singlepiece of metal. I have also sought to provide a simple and effectiveanchorage. i

Fig. 1 is a perspective view of a switch 00 embodying the improvementsof my invention.

Fig. 2 is an enlar ed sectional view showing one of the switc jaws orposts attached to a support. A as Fig. 3 is a side view of one of theposts with a conductor wire attached.

Fig. 4 is a from which fo l med. f h t ig. 5 is a perspective view 0 t e-pos partially formed and with a binding screw. The post or jaw ispreferably formed of pers tive view of the blank a switch post or jawmay be a sin le strip of metal having a base 6,

arms and 8, with upright portions 9 and 10, and terminating in'jaws ortip portions 11 and 12. One of the intermediate portions is preferablyrovided with a. tubular member 13 adapt 'to reg ster with the opening14. The tubular member 13 is interiorly threaded to accommodate theshank of a binding screw 15. This extension 13 may be riveted to moresecurely hold the two side arms to other. I

\ It should single structure the combinatlon of a supnoted'that theshoulders '16 Y and 17 formed immediately above and below ead of the atI provide in the' porting post or jaw for a knife blade switch togetherwith shoulders positioning the conductor-where it ma" be held in placeby a Screw passing direct y into the postwithout the necessityof anyadditional means, such as are commonly employed'in switch constructions.To facilitate the'mountmg of the switch parts I prefer to strike up fromthe base of the jaw, an extension 22, which is interiorly threaded toreceive. the attaching screw 23, which passes through the insulatingbase 24. To facilitate locating and retaining the post or jaw inposition on the base 24 I may form recesses, such as 25, to receive thebase portionsof the posts. The insulating base 24 may be formed of fibreor other compressible material and the recess 25 may be formed byindenting or pressing-in the material of the at. the desired point orP0ints. Y 1

The invention is of course also applicable to the supporting post 26 towhich the switch blade 27 is hmged, as well as to the spring jaw member28 adapted to receive t e switch blade, and in this case I,therefore,-use the terms post and jaw interchangeably to apply to aconstruction of this character.

In the construction of contact jaw 28, it is preferable to rivet the endofthe tubular projection 13 in place so as to secure the arms of the jawtogether positively but in the construction of the hinge jaw 26, theblade 27 -is secured in position usually by means of a rivet 29 WhlChalso secures the arms of the jaw in position, thus in this later form itis not necessary to rivet the tubular projection 13.

I claim:

1. A one-piece knife bIade sWitch jaw comprising a base, arms extendintherefrom, one of said arms having a pe oration and the other arm havingan integral tubular projection extending into and riveted in saidperforation and a binding screw threaded into sai projection.

2. A switch blade jaw member comprising abase, arms extendingtherefrom'and spaced apart at their'outer ends to receive a switchblade, integral means for securing'the intermediate portions of saidarms together, and

commc'rrcu'r, assrcnoia 'ro TEE riwmnum.

a bindingscrew passing through said arms 7 at the point where they aresecured together, one of said arms having projecting wire-retainingshoulders immediately adjacent the head of said screw.

3. A one-piece knife switch jaw compris ing a base, arms extending fromthe outer edges thereof and inclined 'toward each other, one ofsaid armshaving an opening and the other arm having an integral tubu- 1 'larprojection secured in said opening,'and

a binding screw passing through said projection, the outer ends of saidarms being spread apart beyond said screw to receive a switch blade andproviding a shoulder im- 15 mediately adjacent the head-0f said screw 7arms extending from the outer edges thereof a and inclined toward eachother, one of said arms having an opening and the other arm having-anintegral tubular projection secured in said opening, and a binding'screwpassing through said projection, the outer ends of said arms beingspaced apart beyond said screw to receive a switch blade, one of saidarms having wire-positioning lugs disposed around the edge of the headof said'screw.

' GEORGE R. HEBDEN.

